public static void SaveCollectionInXML(StudentContainer studentArray, string filename)
{
XmlSerializer x = new XmlSerializer(studentArray.Students.GetType());
TextWriter writer = new StreamWriter(filename);
x.Serialize(writer, studentArray.Students);
writer.Close();
}
public static StudentContainer SearchBySurname(String surname, StudentContainer studentArray)
{
var searched = new StudentContainer();
if (studentArray.Students != null)
{
var studs = studentArray.Cast <Student>().Where(s => s.LastName.ToLower().Contains(surname.ToLower())).Select(s => s);
foreach (var st in studs)
{
searched.Add(st);
}
return(searched);
}
return(new StudentContainer());
}
public static StudentContainer RemoveStudents(StudentContainer studentArray, StudentContainer removing)
{
for (int i = 0; i < removing.Students.Length; i++)
{
for (int j = 0; j < studentArray.Students.Length; j++)
{
if (studentArray.Students[j].Equals(removing.Students[i]))
{
studentArray.DeleteStudentByIndex(j);
}
}
}
return(studentArray);
}
public static StudentContainer LoadCollectionFromXML(string filename)
{
XmlSerializer formatter = new XmlSerializer(typeof(Student[]));
using FileStream fs = new FileStream(filename, FileMode.OpenOrCreate);
Student[] newpeople = (Student[])formatter.Deserialize(fs);
Student[] arr = new Student[newpeople.Length];
var studentArray = new StudentContainer
{
Students = newpeople,
Empty = newpeople.Length == 0
};
studentArray.RecalculateValues();
return(studentArray);
}
public static StudentContainer Search(String predicate, StudentContainer studentArray, int category)
{
var searched = new StudentContainer();
if (studentArray.Students != null)
{
switch (category)
{
case 0:
{
var studs = from s in studentArray.Students where s.Group.ToLower().Contains(predicate.ToLower()) select s; //отложенное выполнение запроса
foreach (var st in studs)
{
searched.Add(st);
}
break;
}
case 1:
{
var studs = (from s in studentArray.Students where s.Specialization.ToLower().Contains(predicate.ToLower()) select s).ToList(); //принудительное выполнение запроса
foreach (var st in studs)
{
searched.Add(st);
}
break;
}
case 2:
{
var studs = studentArray.Cast <Student>().Where(s => s.Faculty.ToLower().Contains(predicate.ToLower())).Select(s => s); //lambda
foreach (var st in studs)
{
searched.Add(st);
}
break;
}
}
return(searched);
}
return(new StudentContainer());
}
public static void PrintStudents(StudentContainer students)
{
if (students != null)
{
Console.WriteLine("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
Console.WriteLine("| № | Surname | Name | Patronymic | Date of birth | Enter date | Group index | Faculty | Specialty | Academic performance |");
Console.WriteLine("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
int i = 0;
foreach (Student student in students)
{
String output = String.Format("| {0,-3} | {1,-15} | {2,-15} | {3,-16} | {4,-15} | {5,-12} | {6,-13} | {7,-29} | {8,-25} | {9,-25} |",
(++i), student.LastName, student.FirstName, student.Patronymic, student.BirthDate.ToString("dd.MM.yyyy"), student.EnterDate.ToString("dd.MM.yyyy"), student.GroupIndex, student.Faculty, student.Specialization, student.Performance);
Console.WriteLine(output);
}
Console.WriteLine("-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------");
}
else
{
Console.WriteLine("Array is empty");
}
}
public static StudentContainer ReadList(string fileName)
{
try
{
if (fileName == null)
{
fileName = DefaultFilename;
}
var file = new StreamReader(fileName);
var students = new StudentContainer();
string line;
int i = 1;
while ((line = file.ReadLine()) != null)
{
var student = new Student(line, file.ReadLine(), file.ReadLine(),
DateTime.ParseExact(file.ReadLine(), "dd MM yyyy", CultureInfo.InvariantCulture),
DateTime.ParseExact(file.ReadLine(), "dd MM yyyy", CultureInfo.InvariantCulture),
file.ReadLine(), file.ReadLine(), file.ReadLine(), Convert.ToInt32(file.ReadLine()));
line = file.ReadLine();
if (line.Equals(""))
{
Console.WriteLine(i++ + " students read");
}
students.AddStudent(student);
}
;
file.Close();
return(students);
}
catch (Exception e)
{
Console.WriteLine("An error occured while reading file: " + e.Message);
}
return(new StudentContainer());
}
public static void WriteList(StudentContainer students, string fileName)
{
if (fileName == null)
{
fileName = DefaultFilename;
}
var file = new StreamWriter(fileName, false);
foreach (Student student in students)
{
file.WriteLine(student.LastName);
file.WriteLine(student.FirstName);
file.WriteLine(student.Patronymic);
file.WriteLine(student.BirthDate.ToString("dd MM yyyy"));
file.WriteLine(student.EnterDate.ToString("dd MM yyyy"));
file.WriteLine(student.GroupIndex);
file.WriteLine(student.Faculty);
file.WriteLine(student.Specialization);
file.WriteLine(student.Performance);
file.WriteLine();
}
file.Close();
}
public static double CalculateAverageAcademicPerformance(StudentContainer studentArray)
{
return((from s in studentArray.Students select s.Performance).Average());
}
public static double CalculateAverageAge(StudentContainer studentArray)
{
return((from s in studentArray.Students select s.Age).Average());
}
public static void Start()
{
var pigsty = new StudentContainer();
const string fileName = @"C:\Users\Дмитрий Соколенко\source\repos\DotNet\sokolenko05DN\file.txt";
pigsty = FilesIO.ReadList(fileName);
const string fileNameXml = @"C:\Users\Дмитрий Соколенко\source\repos\DotNet\sokolenko05DN\file.xml";
while (true)
{
PrintMainMenu();
int choice;
try
{
choice = Io.EnterInt("choice");
switch (choice)
{
case 1:
{
PrintStudents();
int printChoice = Io.EnterInt("printChoice");
switch (printChoice)
{
case 0:
{
Io.PrintStudents(pigsty);
break;
}
case 1:
{
Io.PrintStudents(StudentContainerProcessing.Search(Io.EnterString("group"), pigsty, printChoice - 1));
break;
}
case 2:
{
Io.PrintStudents(StudentContainerProcessing.Search(Io.EnterString("specialty"), pigsty, printChoice - 1));
break;
}
case 3:
{
Io.PrintStudents(StudentContainerProcessing.Search(Io.EnterString("faculty"), pigsty, printChoice - 1));
break;
}
}
break;
}
case 2:
{
pigsty.AddStudent(CreateStudent());
break;
}
case 3:
{
Io.PrintStudents(pigsty);
pigsty.DeleteStudentByIndex(Io.EnterInt("index") - 1);
break;
}
case 4:
{
var index = GetIndex(pigsty);
var student = pigsty.GetStudent(index);
Console.WriteLine(student.ToString());
int edit = Io.EnterInt("1 if you want to edit");
if (edit == 1)
{
student = CreateStudent();
pigsty.SetStudent(index, student);
}
break;
}
case 5:
{
RemoveStudents();
int deleteChoice = Io.EnterInt("deleteChoice");
pigsty = StudentContainerProcessing.RemoveStudents(pigsty, StudentContainerProcessing.Search(Io.EnterString("choice"), pigsty, deleteChoice));
break;
}
case 6:
{
AvgCalculateOperations();
int avgOperations = Io.EnterInt("avgChoice");;
StudentContainerProcessing.Del del = null;
switch (avgOperations)
{
case 0:
{
del = StudentContainerProcessing.CalculateAverageAge;
break;
}
case 1:
{
del = StudentContainerProcessing.CalculateAverageAcademicPerformance;
break;
}
}
RemoveStudents();
int searchChoice = Io.EnterInt("searchChoice");
Console.WriteLine(del?.Invoke(StudentContainerProcessing.Search(Io.EnterString("choice"), pigsty, searchChoice)));
break;
}
case 7:
{
FilesIO.SaveCollectionInXML(pigsty, fileNameXml);
break;
}
case 8:
{
pigsty = FilesIO.LoadCollectionFromXML(fileNameXml);
break;
}
case 0:
{
FilesIO.WriteList(pigsty, fileName);
return;
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
private static int GetIndex(StudentContainer studentArray)
{
Io.PrintStudents(studentArray);
return(Io.EnterInt("index") - 1);
}